ignorant vs unlettered

ignorant and unlettered both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ignorant	No	Yes	No	No
unlettered	No	Yes	No	No

As adjectives, ignorant and unlettered are synonyms defined as:

ignorant and unlettered: uneducated in general; lacking knowledge or sophistication

Other synonyms of ignorant include nescient, unlearned.

ignorant (adjective)	unlettered (adjective)
unaware because of a lack of relevant information or knowledge	having little acquaintance with writing
uneducated in the fundamentals of a given art or branch of learning; lacking knowledge of a specific field	uneducated in general; lacking knowledge or sophistication
uneducated in general; lacking knowledge or sophistication